[Bug 1785816] Re: Consider enabling CONFIG_NETWORK_PHY_TIMESTAMPING

Mark, if you want to kick the tires on this capability before it goes
out, we're planning to release early next week, just FYI.

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Title:
Consider enabling CONFIG_NETWORK_PHY_TIMESTAMPING

Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Committed

Bug description:
SRU Justification

Impact: CONFIG_NETWORK_PHY_TIMESTAMPING is disabled, preventing PTP
time synchronization using the DP83640 PHYTER.

Fix: Enable this option and set CONFIG_DP83640_PHY=m to enable the
DP83640 PHYTER driver.

Regression Potential: The kconfig help text warns of adding overhead
to network tx and rx, but our analysis finds this to be negligible
(see comment #6). Beyond this we are enabling a new driver which does
little unless timestamping is explicitly activated, so regressions are
not expected.

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Hi folks, is there a reason we do not enable
CONFIG_NETWORK_PHY_TIMESTAMPING ? I'm not sure of the tradeoffs but I
think this config option is required for PTP time syncronization which
would be useful in telco and financial (and OCD :)) environments.

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